1998 Fiscal Year Final Research Report Summary
Seismic Safety Evaluation System on Concrete Bridges in Urban Area using Seismic Ground Motion Obtained from Fault Model
| Project/Area Number |
09555137
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
土木材料・力学一般
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| Research Institution | Nagoya Institute of Technology |
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Principal Investigator |
UMEHARA Hidetaka Nagoya Institute of Technology, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (70151933)
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| Co-Investigator(Kenkyū-buntansha) |
IWAMOTO Masami Nagoya Institute of Technology, Faculty of Engineering, Assistant Professor, 工学部, 講師 (60232716)
SUGITO Masata Gifu University, Faculty of Engineering, Professor, 工学部, 教授 (60115863)
MUTSUYOSHI Hiroshi Saitama University, Faculty of Engineering, Professor, 工学部, 教授 (60134334)
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| Project Period (FY) |
1997 – 1998
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| Keywords | seismic safety evaluation / seismic response analysis / fault model / concrete bridge / seismic acceleration wave |
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| Research Abstract |
The responses of concrete structures effected by a particular earthquake loading highly depend on the exact nature of the seismic wave at the structure location. Hence, when the seismic safety of the structure is evaluated using earthquake response analysis, it is necessary to use the seismic wave at the particular location where the structure is standing. The purpose of this study is to make a seismic safety evaluation system for concrete bridges in urban area using seismic ground motion obtained from the fault model.
The following studies were conducted in this research :
(1) The computer program of dynamic response analysis using finite element method has been developed. The seismic wave at the locations of damaged concrete bridge piers at Sanyo Shinkansen under South Hyogo earthquake obtained using the fault model was used to analytically simulate the dynamic responses and damages of these structures. The analytical results were compared with the actual damages in these structures. By this method, the seismic wave obtained using the fault model as well as the developed analytical method was examined.
(2) The seismic acceleration wave at surface of the footing of six concrete bridges in Nagoya City have been obtained from three kinds of fault models which were made from Tonankai Earthquake, Nobi Earthquake, and Expected Tokai Earthquake. The dynamic behaviors of these six bridges under three kinds of earthquakes were analyzed using the developed program of dynamic response analysis. It was found that two of six bridges would have the large damage at all three kinds of earthquakes because the maximum response displacement exceeded the displacement at the failure. In this way the seismic evaluation system on concrete bridges has been conducted.
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